<div class="container"></div>

<style>
/* From Uiverse.io by ayman-ashine  - Tags: 3d, creative, pattern */
.container {
  width: 100%;
  height: 100%;
  /* Add your background pattern here */
  --color: rgb(255, 50, 50, 0.8);
  background-color: rgb(0, 0, 0);
  background-size: 40px 40px;
  background-image: linear-gradient(45deg, var(--color), transparent 40%),
    linear-gradient(-90deg, var(--color), transparent 20%);
}

</style>
    